Scale mechanism.



A. M. GULL.

SCALE MECHANISM.

APPLIGATION FILED NOV. 17, 1913.

1,124,610. Patented Jan.12,1915.

FIG. 2

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20 FIG 3 -\p- FIG 4 l9 .wL.

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WITNESSES INVENTOR I QMMMZM ALEXANDER Ill. GULL, 0F LOEAIN, GHIG.

SCALE MECHAN Application filed November 17, 1913.

To all whom it may concern:

Be it known that l, ALEXANDER M. GIULL, of Lorain, in the county of Lorain and State of Ohio, have invented a new and useful Scale Mechanism, of which the following 18 a specification.

My invention relates to the construction of scales, and more particularly relates to the construction of the pivot pins, bearings, and shackles forming parts of the scales, and by which the scale levers and scale beams are assembled and are connected into operative relation. Heretofore, with such scales, the pivot pins have been made rectangular in cross section and tapering lengthwise so as to permit of their being driven into tapering holes provided in the scale beams and scale levers and necessarily on account of the ta per, one edge only of the pivot pins being sharpened for service by engagement with the pivot bearings. llt has also been the practice to tightly fit pieces of hardened steel into the shackles forming part of the scale mechanism to provide bearings for engagement with the pivot pins. When in such construction the pivot pins become worn or the bearings in the shackles become loosened or become out or grooved by long use it is necessary to dismantle the scale, and remove the levers and shackles to a repair shop in order to insert new pivot pins and fit the new bearings in place therein to again enable the scale to be accurately balanced as is essential to obtain accurate results in weighing with the scale.

@ne object of my invention is to provide a scale mechanism having pivot pins of novel construction and having improved means for securing the pivot pins in position in the scale levers, whereby the life of the pivot pins is materially increased, the difiiculties heretofore encountered in renewing the pivot pins are avoided, the rapid renewal and adjustment of the pivot pins in the scale levers without dismantling the scale beams or levers is effected, and the loss of time in the use oi" the scale is lessened and prevented.

Another object of my invention is to-provide a scale shackle and bearing mechanism of improved construction whereby the removal and replacement of the bearings and pivot pins are facilitated, the time required in making repairs and ad ustments is lessened and the cost of maintaining the scale Specification of Letters Eatent.

Patented Jan. 12, 191%.

Serial no. 801,399.

mechanism in alinement so as to obtain accurate weighing is very greatly reduced.

Still further objects of my invention will become apparent as the invention is more fully described hereinafter.

The invention consists in providing a pivot pin which is rectangular in cross section and which has parallel sides, and in clamping the pivot pins in position on the scale levers so that the ready removal and re placement is efiected.

The invention further consists in providing a shackle having pivot pin bearings removably and adjustably secured therein whereby renewal and adjustment of the bearings in the shackle Without dismantling the scale mechanism, is made possible.

Referring to the accompanying drawings, Figure 1 is a longitudinal side elevation of a scale lever having pivot pins forming part thereof constructed and arranged and secured in position therein in accordance with my invention. Fig. 2 is a plan of the 7 scale lever shown in Fig. 1. Fig. 3 is a detail side elevation "showing a shackle and pivot pin bearing as constructed and a plied for use on the scale levers in accor ance with this invention. Fig. 4 is a similar detail side elevation showing a modified form of shackle and pivot pin bearing as constructed and arranged in accordance with my invention. Fig. 5 is a detail elevation of the upper end of the shacfies and bearings shown in Figs. 3 and i.

In the accompanying drawings, referring to Figs. 1 and 2, the numeral 2 designates a scale lever having pivot pins 3, i and 5 removably secured in position thereon. These pivotpins are rectangular in cross section and have parallel sides so that they have four parallel edges also, each of which is adapted for use by engagement with the pivot pin bearings, as it is only the projecting. portions Oil the pivot pins which are subject to wear. The scale lever 2 is vided with openings 6, 6 through which the pivot pins extend so that when lined in position an end thereof projects beyond each side of the scale lever 2.. A lug or boss 7 preferably is provided on each side of the lever 2 adjacent to each of the openings 6 which contacts with the pivot pin in the adjacent opening therefor, and in the face of the opening 6 in the scale lever 2, adjacent to the lugs 7 and in one face of pro- the lugs 7, a \l-shaped groove is provided of the same size and shape as the contacting faces of the pivot pins 3 and 4. A cap 8 having a similar V-shaped oove in one face thereof is secured on the osses or lugs 7 on each side of the scale lever and screw threaded bolts 9 and nuts therefor are provided to secure the caps 8 in position on the lugs 7, these bolts extending through registering openings in the flanges of the lugs 7 and caps 8. The \l-shaped grooves in the bosses 7 and caps 8 are arranged to register and they are of such size as to tightly engage with and clamp the pivot pins in position within the so formed openings 6 in the scale lever 2. As the pivot pins have parallel sides, when the one edge of these pivot pins in operative engagement with the bearings or seats therefor has becomeworn through extended service or in other manner, the scale lever 2 can be blocked up in the scale pit to remove the weight thereof from the pivot pin. The bolts 9 can then be slackened and the pivot pin slid lengthwise out of the rectangular opening formed by the grooves in the bosses .7 and caps-8. The pin can be quickly replaced therein with another of the four edges in position to be engaged by the pivot pin bearings or when deslred a new pin substituted therefor. The bolts .9 are then tightened by turning the nuts on the screw threaded ends thereof and the pivot pin is again in readiness for use. The above described operations are repeated with such of the other two edges of the parallel sided pivot pins as require renewal, so that by means of my improved pivot pin construction each of the four edges of the pins is adapted for engagement with the pivot pin bearings and the necessary changes can be made without removal of the scale lever from the scale pit. The pivot pin 5 also mounted in the scale lever 2 is secured thereon by means of a detachable bearing 10 and cap 11. The bearing 10 and its cap 11 have V-shaped recesses therein arranged as has been described to register and form an opening of rectangular cross section and of the same size as the pivot pin 5 which likewise is rectangular in cross section and has parallel sides. Bolts 12 and nuts 13 are employed to secure the cap 11 on the lever bearing 10 in clamping the pivot pin 5 in position on the scale lever 2 and the lever bearing 10 has lugs or ears 10 on each end thereof with elongated openings or slots 14: in these cars through which studs 15 extend.v The slotted openings 14 permit ofadjustment of the bearings 10 and pivot pin 5 lengthwise on the scale lever 2 so as to afford means for rapidly adjusting the scale mechanism in main aining it in the proper alinement,'the nuts on the ends of the studs when'tightened into placejisecurely holding the bearing in adjusted position on the scale lever. 1 Referring now to the construction of Figs.

3 and 4, showing the shackle and shackle bearing for the pivot pins, it will be seen that the end of the scale lever 2 is provided with a pivot pin 5 which is secured in the manner heretofore described in the end of the scale lever 2 by means of a cap 16. The shackles areforked, at one end to form arms 17 between which thepivot pin bearings are secured and the upper end 18 of the shackles is provided with an opening therein through which a pin or bolt 19 extends. Secured between the adjacent sides of the ends 18 of two shackles is a four-sided pivot bearing 20, each of the four sides of this bearing being finished and provided with a seat, preferably formed concave as shown, arranged to engage with a pivot pin when placed in engaging position. On the forked end of the shackle shown in Fig. 3 a single sided bearing 21 is shown, this bearing being secured in position on the shackle by means of the bolt 22 and nut 23. In the shackle shown in Fig. 4 a four-sided bearing 24: is shown, similar in construction to the bearings 20 each of the four sides of the bearing being finished to form a curved seat for engagement with the pivot pins when in assembled position. The lower ends of the arms 17 of the shackle of Fig. 4: have holes therethrough which register with the hole extending lengthwise through the bearing 24: and a pin or bolt 25 is positioned within these registering openings to secure thebearing 24 in position.

In the construction of Figs. 3 and 4, the end of the scale lever 2 is provided with a reinforcing lug or boss 26 which gives a longer bearing for the pivot pin on the lever in the same manner as the lugs 7 and in this way enables the pivot pin being made smaller in cross sectional area without undue loss of strength. 7

In erecting scales provided with my improved scale levers and pivot pin bearings,

.the lever mechanism is assembled in the of the scale lever having the worn or defective pin or hearing and by then releasing the bolts the pivot pins or pivot pin bearings can be removed and renewed without dismantling the scale mechanism. This operation can be quickly efi'ected and when done the scale is again in readiness for use.

The advantages ofmy invention will be apparent to those skilled i'n'the art.

a ses es By the of my improved mism each of the tour edges of the pivet pins can be utilized before disoetdiiig the pin, and the use oi taper pins is avoided and made tmnecessery, White by the use of my impeoved shackle construction the use of pivot pin bearings having two 0E more sides is po$ibie and the, removed. re placement of these hearings Without dismem= tlimg the scale can quickly he eceov ptished his Way e greet saving we and melting repairs to the seeds is effeet-ed. The sceie can be maintained more socureteiy slimmest end mote accurate Weighing ;is made pessibie and toss of time in Weighing by scale is avoided and ovei'come, The use of my improved apparatus also decreases cost of maintenance swim to eretension in the life ofthe wearing parts of the seats Modifications 11111 the construction end as rengemeiit of the parts may be without from my invention as defined he eppemded claims, The memes of secui img the pivot pins in position be P 1 I s 'l varied and the Way in which the seaside bearings are secured to the shackles may be and other variations be made.

By the teem lever it is intended to cover both scale levers and scale beams teeth of which employ pivots pins, SLIJQ the speciicw tion and claims are to be read with this undei'steiiding.

K claim:

1. In e scale, scale beams or ievets pivot pins removebiy secured in said beams or ie= vets and shackles for connecting the pivot pins in said beams or levers ssid sliscides having bearings removebiy secured thereon and said bearings having 2. piuisiity of beering surfaces adapted to engage with said pivot pins,

2. In a sceie, a scale beam or lever having {SKMISV-BZSG opening theretiiiough, a pivot removsbiy seemed in the opening detachsbie caps on opposite sides of the for clamping the pivot pin in position on said beam.

In testimony When-sot I have hereunto set my hand ALEZQANDER G-ULLQ Witnesses Poeem Smee, Gees. N. Feels. 

